<?php
class Http {

    private $obj = null;

    public function __input( $obj ) {
        $this->obj = $obj;
        return $this;
    }

    private function getSupport() {
        //自动获取最佳访问方式	
        if ( function_exists( 'curl_init' ) ) {
            return 1;
        } else if ( function_exists( 'fsockopen' ) ) {
            return 2;
        } else if ( function_exists( 'file_get_contents' ) ) {
            return 3;
        } else {
            return 0;
        }
    }

    //通过get方式获取数据
    public function doGet( $url, $code = null, $timeout = 1, $header = "" ) {
        if ( empty( $url ) || empty( $timeout ) )
            return false;
        if ( !preg_match( '/^(http|https)/is', $url ) )
            $url = "http://" . $url;
        $code = $code == null ? $this->getSupport() : $code;
        switch ( $code ) {
            case 1:
                return $this->curlGet( $url, $timeout, $header );
                break;
            case 2:
                return $this->socketGet( $url, $timeout, $header );
                break;
            case 3:
                return $this->phpGet( $url, $timeout, $header );
                break;
            default:
                return false;
        }
    }

    //通过POST方式发送数据
    public function doPost( $url, $post_data = array(), $code = null, $timeout = 1, $header = "" ) {
        if ( empty( $url ) || empty( $post_data ) || empty( $timeout ) )
            return false;
        if ( !preg_match( '/^(http|https)/is', $url ) )
            $url = "http://" . $url;
        $code = $code == null ? $this->getSupport() : $code;
        switch ( $code ) {
            case 1:
                return $this->curlPost( $url, $post_data, $timeout, $header );
                break;
            case 2:
                return $this->socketPost( $url, $post_data, $timeout, $header );
                break;
            case 3:
                return $this->phpPost( $url, $post_data, $timeout, $header );
                break;
            default:
                return false;
        }
    }

    //通过curl get数据
    private function curlGet( $url, $timeout = 5, $header = "" ) {
        $header = empty( $header ) ? $this->defaultHeader() : $header;
        $ch = curl_init();
        curl_setopt( $ch, CURLOPT_URL, $url );
        curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
        curl_setopt( $ch, CURLOPT_CONNECTTIMEOUT, $timeout );
        curl_setopt( $ch, CURLOPT_TIMEOUT, $timeout );
        curl_setopt( $ch, CURLOPT_HTTPHEADER, array( $header ) ); //模拟的header头
        $result = curl_exec( $ch );
        curl_close( $ch );
        return $result;
    }

    //通过curl post数据
    private function curlPost( $url, $post_data = array(), $timeout = 5, $header = "" ) {
        $header = empty( $header ) ? '' : $header;
        $post_string = http_build_query( $post_data );
        $ch = curl_init();
        curl_setopt( $ch, CURLOPT_POST, true );
        curl_setopt( $ch, CURLOPT_POSTFIELDS, $post_string );
        curl_setopt( $ch, CURLOPT_URL, $url );
        curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
        curl_setopt( $ch, CURLOPT_CONNECTTIMEOUT, $timeout );
        curl_setopt( $ch, CURLOPT_TIMEOUT, $timeout );
        curl_setopt( $ch, CURLOPT_HTTPHEADER, array( $header ) ); //模拟的header头
        $result = curl_exec( $ch );
        curl_close( $ch );
        return $result;
    }

    //通过socket get数据
    private function socketGet( $url, $timeout = 5, $header = "" ) {
        $header = empty( $header ) ? $this->defaultHeader() : $header;
        $url2 = parse_url( $url );
        $url2[ "path" ] = isset( $url2[ "path" ] ) ? $url2[ "path" ] : "/";
        $url2[ "port" ] = isset( $url2[ "port" ] ) ? $url2[ "port" ] : 80;
        $url2[ "query" ] = isset( $url2[ "query" ] ) ? "?" . $url2[ "query" ] : "";
        $host_ip = @gethostbyname( $url2[ "host" ] );

        if ( ( $fsock = fsockopen( $host_ip, $url2[ 'port' ], $errno, $errstr, $timeout ) ) < 0 ) {
            return false;
        }
        $request = $url2[ "path" ] . $url2[ "query" ];
        $in = "GET " . $request . " HTTP/1.0\r\n";
        if ( false === strpos( $header, "Host:" ) ) {
            $in .= "Host: " . $url2[ "host" ] . "\r\n";
        }
        $in .= $header;
        $in .= "Connection: Close\r\n\r\n";

        if ( !@fwrite( $fsock, $in, strlen( $in ) ) ) {
            @fclose( $fsock );
            return false;
        }
        return $this->GetHttpContent( $fsock );
    }

    //通过socket post数据
    private function socketPost( $url, $post_data = array(), $timeout = 5, $header = "" ) {
        $header = empty( $header ) ? $this->defaultHeader() : $header;
        $post_string = http_build_query( $post_data );


        $url2 = parse_url( $url );
        $url2[ "path" ] = ( $url2[ "path" ] == "" ? "/" : $url2[ "path" ] );
        $url2[ "port" ] = ( $url2[ "port" ] == "" ? 80 : $url2[ "port" ] );
        $host_ip = @gethostbyname( $url2[ "host" ] );
        $fsock_timeout = $timeout; //超时时间
        if ( ( $fsock = fsockopen( $host_ip, $url2[ 'port' ], $errno, $errstr, $fsock_timeout ) ) < 0 ) {
            return false;
        }
        $request = $url2[ "path" ] . ( $url2[ "query" ] ? "?" . $url2[ "query" ] : "" );
        $in = "POST " . $request . " HTTP/1.0\r\n";
        $in .= "Host: " . $url2[ "host" ] . "\r\n";
        $in .= $header;
        $in .= "Content-type: application/x-www-form-urlencoded\r\n";
        $in .= "Content-Length: " . strlen( $post_string ) . "\r\n";
        $in .= "Connection: Close\r\n\r\n";
        $in .= $post_string . "\r\n\r\n";
        unset( $post_string );
        if ( !@fwrite( $fsock, $in, strlen( $in ) ) ) {
            @fclose( $fsock );
            return false;
        }
        return $this->GetHttpContent( $fsock );
    }

    //通过file_get_contents函数get数据
    private function phpGet( $url, $timeout = 5, $header = "" ) {
        $header = empty( $header ) ? $this->defaultHeader() : $header;
        $opts = array(
            'http' => array(
                'protocol_version' => '1.0', //http协议版本(若不指定php5.2系默认为http1.0)
                'method' => "GET", //获取方式
                'timeout' => $timeout, //超时时间
                'header' => $header )
        );
        $context = stream_context_create( $opts );
        return @file_get_contents( $url, false, $context );
    }

    //通过file_get_contents 函数post数据
    private function phpPost( $url, $post_data = array(), $timeout = 5, $header = "" ) {
        $header = empty( $header ) ? $this->defaultHeader() : $header;
        $post_string = http_build_query( $post_data );
        $header .= "Content-length: " . strlen( $post_string );
        $opts = array(
            'http' => array(
                'protocol_version' => '1.0', //http协议版本(若不指定php5.2系默认为http1.0)
                'method' => "POST", //获取方式
                'timeout' => $timeout, //超时时间 
                'header' => $header,
                'content' => $post_string )
        );
        $context = stream_context_create( $opts );
        return @file_get_contents( $url, false, $context );
    }

    //默认模拟的header头
    private function defaultHeader() {
        $header = "User-Agent:Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.2.12) Gecko/20101026 Firefox/3.6.12\r\n";
        $header .= "Accept:text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n";
        $header .= "Accept-language: zh-cn,zh;q=0.5\r\n";
        $header .= "Accept-Charset: GB2312,utf-8;q=0.7,*;q=0.7\r\n";
        return $header;
    }

    //获取通过socket方式get和post页面的返回数据
    private function GetHttpContent( $fsock = null ) {
        $out = null;
        while ( $buff = @fgets( $fsock, 2048 ) ) {
            $out .= $buff;
        }
        fclose( $fsock );
        $pos = strpos( $out, "\r\n\r\n" );
        $head = substr( $out, 0, $pos ); //http head
        $status = substr( $head, 0, strpos( $head, "\r\n" ) ); //http status line
        $body = substr( $out, $pos + 4, strlen( $out ) - ( $pos + 4 ) ); //page body
        if ( preg_match( "/^HTTP\/\d\.\d\s([\d]+)\s.*$/", $status, $matches ) ) {
            if ( intval( $matches[ 1 ] ) / 100 == 2 ) {
                return $body;
            } else {
                return false;
            }
        } else {
            return false;
        }
    }

    /*
     功能： 下载文件
     参数:$filename 下载文件路径
     $showname 下载显示的文件名
     $expire  下载内容浏览器缓存时间
    */
    public function download( $filename, $showname = '', $expire = 1800 ) {
        if ( file_exists( $filename ) && is_file( $filename ) ) {
            $length = filesize( $filename );
        } else {
            die( '下载文件不存在！' );
        }

        $type = mime_content_type( $filename );

        //发送Http Header信息 开始下载
        header( "Pragma: public" );
        header( "Cache-control: max-age=" . $expire );
        //header('Cache-Control: no-store, no-cache, must-revalidate');
        header( "Expires: " . gmdate( "D, d M Y H:i:s", time() + $expire ) . "GMT" );
        header( "Last-Modified: " . gmdate( "D, d M Y H:i:s", time() ) . "GMT" );
        header( "Content-Disposition: attachment; filename=" . $showname );
        header( "Content-Length: " . $length );
        header( "Content-type: " . $type );
        header( 'Content-Encoding: none' );
        header( "Content-Transfer-Encoding: binary" );
        readfile( $filename );
        return true;
    }
}

if ( !function_exists( 'mime_content_type' ) ) {
    /**
    +----------------------------------------------------------
     * 获取文件的mime_content类型
    +----------------------------------------------------------
     * @return string
    +----------------------------------------------------------
     */
    function mime_content_type( $filename ) {
        $contentType = array(
            'ai' => 'application/postscript',
            'aif' => 'audio/x-aiff',
            'aifc' => 'audio/x-aiff',
            'aiff' => 'audio/x-aiff',
            'asc' => 'application/pgp', //changed by skwashd - was text/plain
            'asf' => 'video/x-ms-asf',
            'asx' => 'video/x-ms-asf',
            'au' => 'audio/basic',
            'avi' => 'video/x-msvideo',
            'bcpio' => 'application/x-bcpio',
            'bin' => 'application/octet-stream',
            'bmp' => 'image/bmp',
            'c' => 'text/plain', // or 'text/x-csrc', //added by skwashd
            'cc' => 'text/plain', // or 'text/x-c++src', //added by skwashd
            'cs' => 'text/plain', //added by skwashd - for C# src
            'cpp' => 'text/x-c++src', //added by skwashd
            'cxx' => 'text/x-c++src', //added by skwashd
            'cdf' => 'application/x-netcdf',
            'class' => 'application/octet-stream', //secure but application/java-class is correct
            'com' => 'application/octet-stream', //added by skwashd
            'cpio' => 'application/x-cpio',
            'cpt' => 'application/mac-compactpro',
            'csh' => 'application/x-csh',
            'css' => 'text/css',
            'csv' => 'text/comma-separated-values', //added by skwashd
            'dcr' => 'application/x-director',
            'diff' => 'text/diff',
            'dir' => 'application/x-director',
            'dll' => 'application/octet-stream',
            'dms' => 'application/octet-stream',
            'doc' => 'application/msword',
            'dot' => 'application/msword', //added by skwashd
            'dvi' => 'application/x-dvi',
            'dxr' => 'application/x-director',
            'eps' => 'application/postscript',
            'etx' => 'text/x-setext',
            'exe' => 'application/octet-stream',
            'ez' => 'application/andrew-inset',
            'gif' => 'image/gif',
            'gtar' => 'application/x-gtar',
            'gz' => 'application/x-gzip',
            'h' => 'text/plain', // or 'text/x-chdr',//added by skwashd
            'h++' => 'text/plain', // or 'text/x-c++hdr', //added by skwashd
            'hh' => 'text/plain', // or 'text/x-c++hdr', //added by skwashd
            'hpp' => 'text/plain', // or 'text/x-c++hdr', //added by skwashd
            'hxx' => 'text/plain', // or 'text/x-c++hdr', //added by skwashd
            'hdf' => 'application/x-hdf',
            'hqx' => 'application/mac-binhex40',
            'htm' => 'text/html',
            'html' => 'text/html',
            'ice' => 'x-conference/x-cooltalk',
            'ics' => 'text/calendar',
            'ief' => 'image/ief',
            'ifb' => 'text/calendar',
            'iges' => 'model/iges',
            'igs' => 'model/iges',
            'jar' => 'application/x-jar', //added by skwashd - alternative mime type
            'java' => 'text/x-java-source', //added by skwashd
            'jpe' => 'image/jpeg',
            'jpeg' => 'image/jpeg',
            'jpg' => 'image/jpeg',
            'js' => 'application/x-javascript',
            'kar' => 'audio/midi',
            'latex' => 'application/x-latex',
            'lha' => 'application/octet-stream',
            'log' => 'text/plain',
            'lzh' => 'application/octet-stream',
            'm3u' => 'audio/x-mpegurl',
            'man' => 'application/x-troff-man',
            'me' => 'application/x-troff-me',
            'mesh' => 'model/mesh',
            'mid' => 'audio/midi',
            'midi' => 'audio/midi',
            'mif' => 'application/vnd.mif',
            'mov' => 'video/quicktime',
            'movie' => 'video/x-sgi-movie',
            'mp2' => 'audio/mpeg',
            'mp3' => 'audio/mpeg',
            'mpe' => 'video/mpeg',
            'mpeg' => 'video/mpeg',
            'mpg' => 'video/mpeg',
            'mpga' => 'audio/mpeg',
            'ms' => 'application/x-troff-ms',
            'msh' => 'model/mesh',
            'mxu' => 'video/vnd.mpegurl',
            'nc' => 'application/x-netcdf',
            'oda' => 'application/oda',
            'patch' => 'text/diff',
            'pbm' => 'image/x-portable-bitmap',
            'pdb' => 'chemical/x-pdb',
            'pdf' => 'application/pdf',
            'pgm' => 'image/x-portable-graymap',
            'pgn' => 'application/x-chess-pgn',
            'pgp' => 'application/pgp', //added by skwashd
            'php' => 'application/x-httpd-php',
            'php3' => 'application/x-httpd-php3',
            'pl' => 'application/x-perl',
            'pm' => 'application/x-perl',
            'png' => 'image/png',
            'pnm' => 'image/x-portable-anymap',
            'po' => 'text/plain',
            'ppm' => 'image/x-portable-pixmap',
            'ppt' => 'application/vnd.ms-powerpoint',
            'ps' => 'application/postscript',
            'qt' => 'video/quicktime',
            'ra' => 'audio/x-realaudio',
            'rar' => 'application/octet-stream',
            'ram' => 'audio/x-pn-realaudio',
            'ras' => 'image/x-cmu-raster',
            'rgb' => 'image/x-rgb',
            'rm' => 'audio/x-pn-realaudio',
            'roff' => 'application/x-troff',
            'rpm' => 'audio/x-pn-realaudio-plugin',
            'rtf' => 'text/rtf',
            'rtx' => 'text/richtext',
            'sgm' => 'text/sgml',
            'sgml' => 'text/sgml',
            'sh' => 'application/x-sh',
            'shar' => 'application/x-shar',
            'shtml' => 'text/html',
            'silo' => 'model/mesh',
            'sit' => 'application/x-stuffit',
            'skd' => 'application/x-koan',
            'skm' => 'application/x-koan',
            'skp' => 'application/x-koan',
            'skt' => 'application/x-koan',
            'smi' => 'application/smil',
            'smil' => 'application/smil',
            'snd' => 'audio/basic',
            'so' => 'application/octet-stream',
            'spl' => 'application/x-futuresplash',
            'src' => 'application/x-wais-source',
            'stc' => 'application/vnd.sun.xml.calc.template',
            'std' => 'application/vnd.sun.xml.draw.template',
            'sti' => 'application/vnd.sun.xml.impress.template',
            'stw' => 'application/vnd.sun.xml.writer.template',
            'sv4cpio' => 'application/x-sv4cpio',
            'sv4crc' => 'application/x-sv4crc',
            'swf' => 'application/x-shockwave-flash',
            'sxc' => 'application/vnd.sun.xml.calc',
            'sxd' => 'application/vnd.sun.xml.draw',
            'sxg' => 'application/vnd.sun.xml.writer.global',
            'sxi' => 'application/vnd.sun.xml.impress',
            'sxm' => 'application/vnd.sun.xml.math',
            'sxw' => 'application/vnd.sun.xml.writer',
            't' => 'application/x-troff',
            'tar' => 'application/x-tar',
            'tcl' => 'application/x-tcl',
            'tex' => 'application/x-tex',
            'texi' => 'application/x-texinfo',
            'texinfo' => 'application/x-texinfo',
            'tgz' => 'application/x-gtar',
            'tif' => 'image/tiff',
            'tiff' => 'image/tiff',
            'tr' => 'application/x-troff',
            'tsv' => 'text/tab-separated-values',
            'txt' => 'text/plain',
            'ustar' => 'application/x-ustar',
            'vbs' => 'text/plain', //added by skwashd - for obvious reasons
            'vcd' => 'application/x-cdlink',
            'vcf' => 'text/x-vcard',
            'vcs' => 'text/calendar',
            'vfb' => 'text/calendar',
            'vrml' => 'model/vrml',
            'vsd' => 'application/vnd.visio',
            'wav' => 'audio/x-wav',
            'wax' => 'audio/x-ms-wax',
            'wbmp' => 'image/vnd.wap.wbmp',
            'wbxml' => 'application/vnd.wap.wbxml',
            'wm' => 'video/x-ms-wm',
            'wma' => 'audio/x-ms-wma',
            'wmd' => 'application/x-ms-wmd',
            'wml' => 'text/vnd.wap.wml',
            'wmlc' => 'application/vnd.wap.wmlc',
            'wmls' => 'text/vnd.wap.wmlscript',
            'wmlsc' => 'application/vnd.wap.wmlscriptc',
            'wmv' => 'video/x-ms-wmv',
            'wmx' => 'video/x-ms-wmx',
            'wmz' => 'application/x-ms-wmz',
            'wrl' => 'model/vrml',
            'wvx' => 'video/x-ms-wvx',
            'xbm' => 'image/x-xbitmap',
            'xht' => 'application/xhtml+xml',
            'xhtml' => 'application/xhtml+xml',
            'xls' => 'application/vnd.ms-excel',
            'xlt' => 'application/vnd.ms-excel',
            'xml' => 'application/xml',
            'xpm' => 'image/x-xpixmap',
            'xsl' => 'text/xml',
            'xwd' => 'image/x-xwindowdump',
            'xyz' => 'chemical/x-xyz',
            'z' => 'application/x-compress',
            'zip' => 'application/zip',
        );
        $type = strtolower( substr( strrchr( $filename, '.' ), 1 ) );
        if ( isset( $contentType[ $type ] ) ) {
            $mime = $contentType[ $type ];
        } else {
            $mime = 'application/octet-stream';
        }
        return $mime;
    }
}

if ( !function_exists( 'image_type_to_extension' ) ) {
    function image_type_to_extension( $imagetype ) {
        if ( empty( $imagetype ) ) return false;
        switch ( $imagetype ) {
            case IMAGETYPE_GIF    :
                return '.gif';
            case IMAGETYPE_JPEG    :
                return '.jpg';
            case IMAGETYPE_PNG    :
                return '.png';
            case IMAGETYPE_SWF    :
                return '.swf';
            case IMAGETYPE_PSD    :
                return '.psd';
            case IMAGETYPE_BMP    :
                return '.bmp';
            case IMAGETYPE_TIFF_II :
                return '.tiff';
            case IMAGETYPE_TIFF_MM :
                return '.tiff';
            case IMAGETYPE_JPC    :
                return '.jpc';
            case IMAGETYPE_JP2    :
                return '.jp2';
            case IMAGETYPE_JPX    :
                return '.jpf';
            case IMAGETYPE_JB2    :
                return '.jb2';
            case IMAGETYPE_SWC    :
                return '.swc';
            case IMAGETYPE_IFF    :
                return '.aiff';
            case IMAGETYPE_WBMP    :
                return '.wbmp';
            case IMAGETYPE_XBM    :
                return '.xbm';
            default                :
                return false;
        }
    }

}

?>